Pulp dehydrator



Judy 3l, i923.

IAEIZR R. A. NORTH PULP DEHYDRATOR July 3l, i923.

R. A. NORTH PULP DEHYDRATOR 2 Sheetswsheet 2 Patented July 3l, 1923,

narran stares -PA'rsnr ortica. 'y

RAY ADA. NORTH', OF GREEN BAY, lfflfsCNSN, ASSIGNOR TO E. PAYSON SMITH,

' 0F GREEN BAY, WSCONSIN.

PULP DEHYDRATOR.

Application filed July 1, 1921. Serial No. 481,821.

To all whom t may concern Be it known that 1, RAY AWORTH, a citi` zen ot the United States ci' America, residing at Green Bay, in the county ot' Brown e and State of Wisconsin, have invented certain new and useful Improvements in Pulp Dehydrators, of which the following is a specification.

The present invention relates to improvel@ ments iny'that type of machine which is spe- E@ fully set Jforth.

In the drawing Figure 1r is a front eleva-tion of the dehydrating machine embodying my invention.

Figure 2 is an end elevation of Figure 1, parts being` broken away and parts shown in section. f

rlhe reference numeral 1 designates a casing ot any suitable construction having top, side and end walls. Within the casing l mount an arcuate pressure plate 2, which rests on the bottom of the casing but is otherwise spaced from the walls ot the casing eX- cept at the end walls ot the casing with which the said plate abuts. It will be noted r that the inlet end 3 of the pressure plate is in a lower horizontal planethan the outlet end 4, as clearly shown in Figure 2 of the drawing.

rlhe discharge apron 5 is swingingly mounted on the discharge end 4 oi' the pressure plate 2'` and is adjustable to various angles according to the desires of the operator. This apron is adapted to guide the dehydrated pulp and the like into the receiving r trough 6, but intheievent that it is desired to direct the tie-hydrated pulp through a pipe 7 l provide the apron with a port int ermediate its edges.l which is temporarily closedl by the plug 8 so that when the apron 50 5 is swung to an upward position the pulp will be discharged through the port in the apron when the plug 8 is removed theretrom.

rlhc drum 9 is oit Spider construction and is1 provided around its periphery with aseries of wire mesh panels 10, which are secured in position by any suitable means, such as the strips 1l. f The drum is provided with al sprocket wheel 12, which is connected by means of a drive chain 18 to a suit-able pinion 14 keyed to the shaft of the power wheel 15. Any suitable driving mechanism may be substituted for the one shown.

16 is an inlet pipe at the rear 01"' the machine.l which is adapted to deliver the mate rial to be treated in the casing to a rpoint above the edge 3 of the pressure plate 2, at which point the material to be treated drops into the space between the pressure plate 2 and the periphery of the drum 9.

It will be noted that the drum 9 is revo- Y lubly mounted within the casing 1 with its periphery eccentric with respect t0 the pressure plate 2 so that there is formed between the periphery ot the drum 9 and the 'pres- `sure plate 2, a channel or space which gradually narrows toward the outlet end 4 of the pressure plate 2, at which point the passage way 16 is of less ycross sectional area than at any otherpoint.

4 A spraypipe 17 is suspended within the drum 9 and connected with the supply pipe 18, said spray-pipe being located in close proximity to the periphery ot the drum and positioned in a horizontal plane slightly above the horizontal plane of the receiving edge 3 of the pressure plate 2, as clearly shown in Figure 2. A spray pipe 19, connected with the supply pipe 18, is positioned outside of the drum near the periphery thereof in a horizontal plane above the horizontal' plane of the outlet edge 4 of the pressure plate. y20 is a liquid outlet pipe in connection with the interior ot the machine, whereby liquid extracted ,from substance under treatment may readily escape tromV the machine; Y Y ln the operation ot the machine the pulp, sewerage. and the like, to bede-hydrated is introduced into the machine through the inlet pipe 16 and travels upwardly until it reaches a point above the inlet edge 8 ot the pressure plate 2, at which point it drops onto the pressure plate 2 between the periphery ot the drum 9 and the pressure plate,` Should v anyof the material have a tendency to rise above this point ot inlet at the top edge 3 of the pressure plate 2 the sprayer blastirom the pipe 17 through the wire mesh lotthe drum forces the material under treatment to flow intothe passageway 16 and at the same time thoroughly cleanses the meshes of the wire panels l0V previous to their passing below theedge 3 of the pressure plate/J, so that these meshes arealways free when working in conjunction with the pressure plate 2, to admit of the passage of liquid therethrough.

The drum is provided on its periphery with a series of stock pushers 2l which pushers push the stock or material under treatment through the passageway 16 and'prevent the stock or material under treatment from becoming` dry, andV also have a tendency to. roll the stock while under treatment, thereby preventing it from packing; and breaking the wire panels l0,

As the pulp or material under treatment passes forwardly through the passageway 16 it goes into the TQjradaially narrowing outlet portion of the passageway and is compacted to such extent that substantially all of the moisture is compressed there-from by the time that'the stock arrives at the outlet edge fl of the pressure plate 2, whereupon continued movement of theA parts brings the dehydrated material above the apron 5 and it Vflows on said apron and is delivered into the receptacle 6 or the outletV pipe? as the operator may elect. Should the material under treatment haveV a tendency to stick to the periphery of the drum 9 above 'the apron 5 the spray from the pipe 19 being directed in a downwardly inclined angle as indicated, will strip the de-hy' drated material from the periphery of the drum and cause it to flow upon theapron 5, and at the same time will cleanse the meshes of the wire panels 10, thereby lreepingr them clear for elhcient work in cle-hydratingr the. material under treatment.

Surplus water or liquid from the material under treatment passes out of the machine throughthe pipe'ZO. Y

From the above it will be seen that the machine is easilylrept clean for etlicient action, that it basa maximum capacity, and is economical in operation.' In actual practice the machine has proven highly efficient.

What I claim is: Y

1. In a pulp de-hydrator thefcombination Ywith a casing, and an imperforate arcuate pressure plate therein, of a drum hf-ivinga perforated periphery and revolubly mounted in said casing; with its periphery eccenf tric `to saidplate, whereby a comparatively wide mouth is formed' at one side of the cle-hydrator between 4the drum and plate and a comparatively narrow'pulp exit is formed at the other'side of the de-hydrator,

an inlet pipe in communication with the saidmouth,"a spray pipe within the drum adapted to direct a spray outwardly throusrhV the perforated periphery of thev drum abfive the said mouth, and a spray pipe outside of the drum adapted to direct spray -through the perforatedy periphery into the drum above the outlet between the drum and plate, and an apron to receivethe dehydrated pulp as it falls from the periphf vdrum being perforated, a stationary water spray pipe within tliekdrum adapted to direct a spray from the inside through the perforated periphery of the drum, and a spray pipe outside Yof and adapted to direct a spray through the perforated periphery into the drum. j 7

fr. In a pulp de-hydrator'of the'charac? ter described, the combination with an arcuate pressure plate, of a drum revolubly mounted and eccentrically mounted with respect to said plate, the periphery of the drum beingf perforated, a stationary water spray pipe within the drum adapted to direct a spray from the inside through the perforated periphery of the drum, and a spray pipe outside of and adapted to direct a spray through the perforated periphery into the drum, and a water outlet, pipe communicating with the interior of the drum.

5. 'In a pulp cle-hydrator of the character described, the combination with an arcuate pressure plate, of drum revolubly and eccentrically mounted with respect to said plate, the periphery of the drum beingr perforated, a stationary spray pipe within the drum, adapted to direct a spray from the inside through .the periphery ofthe drum, a delivery apron to receive the dehydrated pulp from between the periphery oftliedrum and said plate, and a spray pipe positioned outside of the drum above said apron and adapted to direct a spray into the ldrum `through the periphery of the A'dru'm. A,

G. Ina Vpulp de-hydrator 4of the character described, the combination with an arcuate pressure plate, of a drum revolubly and 'eccentrically mounted with respect to said plate, the periphery of the druml being' perforated, a stationary spray pipe within the drum adapted to direct a spray from the inside through the periphery of the drum, a delivery apron to receive the dehydrated pulp from between the periphery of the drum and said plate, and a spray pipe po- Stoned outside' of the drum abeve said,

apron and adapted to direct a spray into the drum through the periphery of the drum, and e Water outlet pipe communicating;` with the interior of the drum.

7. In a pulp de-hydrator of the character described, the combination with an arcuate pressure plete, of a drum revolubly and eccentricelly mounted with respect to said plate, the periphery of the drum being perforated, a stationary Water Spray Within the drum adapted to direct a spray from the inside through the periphery of the drum, a delivery apron to receive the dehydrated pulp from between the plate and drum, a

spray pipe positioned outside of the drum and adapted to direct a spray into the drum above the said apron, and a series of pulp pushers projecting from the periphery of the drum.

ln testimony whereof I affix my signa- 2U ture.

RAY ADNA N ORTH. 

